With the billions plus dollers raking in with The Dark Knight Trilogy will future comic book movies move further away from the material? Just because the character wears a bat-suit and is named Bruce wayne does that make him Batman? To the general public does it matter? If the general public go to see these movies and it rakes in big how close should they stick to the material? But the general public must be fans in some ways if they are going to these films?

Yes.

Whose to say the movies aren't also material? Maybe the comics are the ones not sticking close.